In a large bowl, whisk together flour, baking powder, baking soda, sugar and salt.

In a medium bowl, add cold buttermilk and melted butter - mix together until butter forms small clumps. Pour mixture into the dry and stir just until combined.

Scoop out the mixture using a large cookie scoop (about 1/4 cup worth) and drop onto parchment-lined baking sheet, spacing biscuits about 1 1/2 inches apart. Bake until tops are golden brown and crisp, about 12 to 14 minutes.

To finish the biscuits

When they come out of the oven, brush the tops with the 2 tablespoons of melted butter. Move the biscuits to a wire rack and cool about 5 minutes before serving. Transfer to wire rack and let cool 5 minutes before serving.